Daewoo DTQ-14Z5SC, Service Manual, Page: 27 / 35

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Appendix IC DESCRIPTION
I. MICOM Outline.
1. Abstract.
This specification is 1-Tunner Mono Model for North America, CCD 1-Chip MICOM LA76950B
It is developing software specification for tuning only NTSC system TV F/S.
2. H/W Outline.
1) ROM : 32K x 8bits.tsc
2) RAM : 1152 x 8bits.
3) OSD Function.
. Screen Display. :32 characters x 2 lines.
. Characters.
254 patterns programmable.
. Character display area
CC mode : 16 x 26 dots
. Chatacter color : 8 colors
. Attribute
CC mode : smooth italic, underline, flash, automatic solid space
OSD mode : border
. Display position
Horizontal : 128 levels
Vertical : 512 levels
3. System Feature.
. The system for TV tuning is Frequency Synthesis type.
. Closed Caption
¡fl
s function is built in IC.
. On Screen Display
¡fl
s function is built in IC.
. Package. : 64 PIN DIP.
. Tuner (Pre-scaler.) : I
2
C Bus. --- 115-B-B9015AU
.
Remote. : R-48C04 Series
. E
2
PROM. : 24C04(I
2
C Bus) a Apply one byte Read/Write mode.
. 6-Local Key. : A/D Input Control.(Power, Ch Up/Down, Vol Up/Down, Menu)
. Option S/W : Port Input Option Check.
. IF/V/C/D IC : LA76950B (America, The only NTSC)
4. Function.
1) C. C. D. function.
. A section of C. C. D. operates FCC based specification.
2) C. C. D. controlled function.
. Closed Caption Mode. (Off<-->C1<-->C2<-->T1<-->T2<-->Off)
. CC On Mute.(Off / On)
. When CC On Mute is On, Output is selected a item of Closed Caption Modes.
3) Tuning Function.
. I
2
C Bus.
. PLL IC Interface.
. FS 181 Channel (AIR 2-69CH, CABLE 1-125CH)
. AFT Operation(Fine Tuning ) -2.5
Fn+2.5MHz
. AIR/CABLE (STD, HRC, IRC ). Only Cable 5,6CH is that AFT range is cover over
broad-band. -2.5MHz
Fn+3.5MHz.
. Auto Program.(If a channel is broadcasting, the channel is memorized.)
. Direct Tuning(0 9KEY)
. Channel Up/Down.(Memorized Channels) -> The Ch Up/Down buttons on the Remote and